Exploring Work and Power in Physics

What is work defined as in physics?

• The distance an object is moved

• The speed at which an object is moved

• The amount of time taken to move an object

• The amount of energy transferred when a force moves something

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which of the following is an example of work being done?

• Pushing a box across the floor

• Holding a book in place

• Standing still

• Sitting on a chair

What units are used to measure work, force, and distance respectively?

• Watts, Pounds, and Kilometers

• Joules, Newtons, and Meters

• Watts, Newtons, and Kilometers

• Joules, Pounds, and Meters

If a person pushes a box with a force of 300 Newtons for 2 meters, how much work is done?

• 600 Joules

• 300 Joules

• 900 Joules

• 150 Joules

Tags

NGSS.MS-PS3-5

What is the formula for calculating power?

• Power = Work done × Time

• Power = Work done ÷ Time

• Power = Force ÷ Distance

• Power = Force × Distance

If two people push a box with the same force and distance but one takes 10 seconds and the other 20 seconds, who has more power?

• Power cannot be determined

• Both have the same power

• The person who took 10 seconds

• The person who took 20 seconds